| Message ID | 20170426111809.19922-11-lorenzo.pieralisi@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Wed, Apr 26, 2017 at 1:18 PM, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> wrote: > The introduction of pci_scan_root_bus_bridge() provides a PCI core > API to scan a PCI root bus backed by an already initialized > struct pci_host_bridge object, which simplifies the bus scan > interface and makes the PCI scan root bus interface easier to > generalize as members are added to the struct pci_host_bridge(). > > Convert PCI rcar host code to pci_scan_root_bus_bridge() to > improve the PCI root bus scanning interface. > > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > Cc: Bjorn Helgaas <bhelgaas@google.com> > Cc: Simon Horman <horms@verge.net.au> > --- > drivers/pci/host/pcie-rcar.c | 28 ++++++++++++++++++---------- > 1 file changed, 18 insertions(+), 10 deletions(-) > > diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c > index cb07c45..051b4db 100644 > --- a/drivers/pci/host/pcie-rcar.c > +++ b/drivers/pci/host/pcie-rcar.c > @@ -451,27 +451,35 @@ static int rcar_pcie_enable(struct rcar_pcie *pcie) > { > struct device *dev = pcie->dev; > struct pci_bus *bus, *child; > - LIST_HEAD(res); > + struct pci_host_bridge *bridge; > + int ret; > + > + bridge = pci_alloc_host_bridge(0); > + if (!bridge) > + return -ENOMEM; The pci_alloc_host_bridge() here should also be moved into rcare_pcie_probe(), replacing the devm_kzalloc there. Arnd
diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c index cb07c45..051b4db 100644 --- a/drivers/pci/host/pcie-rcar.c +++ b/drivers/pci/host/pcie-rcar.c @@ -451,27 +451,35 @@ static int rcar_pcie_enable(struct rcar_pcie *pcie) { struct device *dev = pcie->dev; struct pci_bus *bus, *child; - LIST_HEAD(res); + struct pci_host_bridge *bridge; + int ret; + + bridge = pci_alloc_host_bridge(0); + if (!bridge) + return -ENOMEM; /* Try setting 5 GT/s link speed */ rcar_pcie_force_speedup(pcie); - rcar_pcie_setup(&res, pcie); + rcar_pcie_setup(&bridge->windows, pcie); pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS); + bridge->dev.parent = dev; + bridge->sysdata = pcie; + bridge->busnr = pcie->root_bus_nr; + bridge->ops = &rcar_pcie_ops; if (IS_ENABLED(CONFIG_PCI_MSI)) - bus = pci_scan_root_bus_msi(dev, pcie->root_bus_nr, - &rcar_pcie_ops, pcie, &res, &pcie->msi.chip); - else - bus = pci_scan_root_bus(dev, pcie->root_bus_nr, - &rcar_pcie_ops, pcie, &res); + bridge->msi = &pcie->msi.chip; - if (!bus) { - dev_err(dev, "Scanning rootbus failed"); - return -ENODEV; + ret = pci_scan_root_bus_bridge(bridge); + if (ret < 0) { + kfree(bridge); + return ret; } + bus = bridge->bus; + pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci); pci_bus_size_bridges(bus);
The introduction of pci_scan_root_bus_bridge() provides a PCI core API to scan a PCI root bus backed by an already initialized struct pci_host_bridge object, which simplifies the bus scan interface and makes the PCI scan root bus interface easier to generalize as members are added to the struct pci_host_bridge(). Convert PCI rcar host code to pci_scan_root_bus_bridge() to improve the PCI root bus scanning interface. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Simon Horman <horms@verge.net.au> --- drivers/pci/host/pcie-rcar.c | 28 ++++++++++++++++++---------- 1 file changed, 18 insertions(+), 10 deletions(-)